51 St. Maurice and Claiborne Pelecypoda 51 



both from 400 and 1200 ft. ; Wautubbee, Miss, (var); Claiborne 

 stage, — Ferruginous sands at Claiborne, Ala. 



Vaughan cites this species from various localities in the Mc- 

 Bean formation in Georgia. 

 Glycymeris sabinensis, n. sp., Pi. 21. Figs. 8-10 



Characterization. — Shell small, Glycynieris-X'C&&'va. general, but 

 with deltoid ligamental area unusually deep and very limited lat- 

 erally for adult specimens, flanked on either side b}^ a pronounced 

 cardinal area, features creating, at first sight, a LiviopsisASk& as- 

 pect ; exterior ornamented by numerous well-marked, broadly 

 rounded ribs over which the fimbriate growth lines sweep in ex- 

 quisite beauty and regularity. 



Twenty-five years ago, in a MS report, pi. 7, fig. 8, on the 

 Tertiary Mollusca of Texas I illustrated this species, but having 

 only one shell, I refrained from naming it, thinking perhaps it 

 should be referred to the young of some form not then known to 

 me. However, Mr. A. C. Veatch, while assisting on the Louis- 

 iana Survey, found a large amount of interesting fossils along the 

 Sabine River during his solitary canoe trip in 1900. In working 

 over this material recently a goodl}^ number of specimens of this 

 species was found in with Limopsis avicidoides. They are from 

 the Texas side of the Sabine about on the Tp. line between 4 and 

 5 N., La. land survey. Hence they are of St. Maurice Eocene 

 age. 



Types. — Deposited in the Paleont. Mus. Cornell Univ. 



Localities. — ElmCr., I^ee Co. ; Sabine River as above stated. 



/ 

 Area rhomboidelfa Lea, PI. 21. Figs. ^-17. PI. 22. Figs, i-^.y 



A.rhoniboidella Lea, Cont. to Geol., 1833, p. 74, pi. 2, fig. 52. 

 Anotnalocardia thomboidella Con., Jr. Am. Conch., vol. i, 1865, p. 11. 

 Area {CucuUcearca)cuciMoides d.& Greg., non Con., Mon. Faun. Eoc. 



Ala., 1890, p. 195, pi. 24, figs. 17-20. 

 Area rhoniboidella Coss. (in part). Notes Compl. 1893, p. 17. 

 Area {^Seapharca) rho7)iboidellaT>&\\, Trans. Wag. &c. , III, '95, p. 625. 

 Area rhoniboidella Sheldon, Paleont. Amer., vol. i, 1916, p. 30, pi. VII, 



6-10. 



Lea^s original description. — Shell rhomboidal, very inequilateral, 

 compressed at base, longitudinally and closely ribbed ; substance of the 



